DE1298712B - Thermoplastic masses - Google Patents

Description

The patent application P 1267 423.6-43 relates to stalls, water-soluble soft thermoplastic materials are used instead for the production of molders. ..'.'- ,.
bodies, consisting of polyolefins, fillers and the presence of plasticizers, plasticizers that a) 30 to 80 percent by volume of a polyolefin or a polyolefin mixture with a 5 improves the processability of the plastic by lowering the melt index and thereby lowering the melt index under standard loading of about zero , for the production and processing of plastic

b) 6 to 50 percent by volume of an inert filler and mass required energy expenditure is reduced.

c) 7 to 40 volume percent of a conventional plasticizer. In addition, the flexibility of the end maker increases contain. Product, such as the measurement of elongation at break, the

The subject of the invention is a further development and elongation at the yield point, the Spencer-impact improvement show the thermoplastic compositions according to tests and the impact stress. Next is that Main patent application, which is characterized by plasticizers that component of the Polyolefinnet is that they contain water-insoluble fillers and filler-plasticizer compounds that are used in the manufacture of Wholly or partially water-soluble plasticizers are easiest to extract from entporous products. keep. 15 If the plasticizer according to the invention partially

It is already known to be microporous or completely water-soluble made of plastic by performing the extraction with water, which is more economical Plastic mass before processing is soluble and safer than extraction with orga filler adds and this then by niche solvents. In addition, the Extraction with a suitable solvent her- ao water-soluble plasticizers the polyolefin or the triggers. However, the invention specifically relates to a polyolefin filler substrate of hydrophilic character, Further development of the subject matter of the main patent, which is particularly desirable if for the registration, after which particularly favorable results intended use of the porous product the can be achieved by using a polyolefin with conductivity and permeability values as possible Melt index under standard loading must be essentially low. The plasticizer does not have to be borrowed zero, because this then also necessarily dissolve larger in the polymer, but it is each Amounts of filler and otherwise incompatible soft, low-boiling liquid suitable for the processors can be added. Contrasted with the availability of the bulk and the flexibility of the end stand According to the invention, insoluble products are improved in technology. Suitable for the multitude Fillers used; for the production of porous counter- 30 water-soluble plasticizers include:

a) Glycol, glycol ethers and esters.

b) glycerine, glycerine monoacetate,

c) Diethylene glycol, diethylene glycol ethers and esters, triethylene glycol,

d) polyethylene glycols (molecular weight 400 to 20,000),

e) propylene glycol, dipropylene glycol,

f) polypropylene glycols (molecular weight 260 to 12,000),

g) trimethylene glycol, tetramethylene glycol, 2,3-butylene glycol,
h) alkyl phosphates (e.g. triethyl phosphate),

i) water soluble polymers such as polyvinyl alcohol, partially hydrolyzed Polyvinyl acetate, polyacrylic acid and polyvinyl pyrrolidone.

The above-mentioned water-soluble plasticizer ethylene, filler and plasticizer were on one

can be used together with water-insoluble soft hydraulic press at 176 ° C and approx. 70 kg / cm ³

can be used, for example, in foils with a nominal thickness of 0.5 mm.

presses the one on which the main patent application is based. To determine the tensile strength using a

Documents are mentioned provided that at least 50 Instron examiners have been cut from the slide

part of the plasticizer mixture is water-soluble. stretched samples of 6.3 mm wide used the

In addition, a suitable water-insoluble filler must be clamped at a distance of 5.1 cm and at a

substance can be used. Speed of 2.54 cm or 50% per minute

Apart from the content of water-insoluble were investigated.

Fillers and wholly or partially water-soluble 55 Of each mixture, three samples were placed under plasticizers the masses resemble according to the invention. The tensile modulus was derived from the results tion according to the main patent application, and the elongation at break calculated in percent. Elected as these are produced in the usual way and the strain increases as the test pieces are stretched is working. For the production of porous moldings, the process starts quickly, but drops at the yield point, but naturally the water-soluble plasticizer 60 as soon as the sample becomes cold flowing. The train module with Water instead of an organic solution values show in particular the rigidity of the pro-means extracted. ben on.

In the following Tables 1 and 2, some of the Spencer impact test with which the tearers many of the filling resistance of thin foils found to be particularly suitable has been determined Fabric-plasticizer-polymer combinations again on 0.13 to 0.20 mm thick samples with a passed. The physical knife of 12.7 cm specified in the tables was made. For samples that After the following test, the technical properties survived this test undamaged, but no measured value can be obtained Methods determined: The mixtures of poly- are given.

3 4

Table 1 Physical properties of samples with a content of water-soluble plasticizers

Composition by volume

Sample no.
I 3

Polyethylene *

kaolin

Plasticizers

Melt index

at medium load

at high loads

Tensile modulus, kg / cm ²

Tensile strength, kg / cm ²

Elongation at break, ° / o

Spencer impact test, kg / cm ² x 10 ^s * density 0.95, melt index 0.

40 30

Glycerin 30

0.030 19

4.270 40.6

6.5

Tabel

40 30th

Ethylene glycol
30th

0
0.11

78.5
26th

40 30th

Diethylene glycol
30th

0.008

2.1

8.610
61.6
24

Physical properties of samples with a content of water-based and water-insoluble plasticizers

Composition by volume

Sample no.
6th

Polyethylene * 17 17

Finely ground silica 18 18

(Glycerin 44 44

Plasticizers \ , _, .. ,,,. _ΛΛ """"

{+ Petroleum fraction ** 21 j 21

Melt index

at medium load 0

at high load 0.001

Tensile modulus, kg / cm ² 84.8 593

Load at the yield point, kg / cm ² - 21.9

Elongation at the yield point,% -

Work kg / cm - 6.6

Tensile Strength, kg / cm ² 5.9 21.6

Elongation at break,% 36 85.5

* Melt index 0, reduced specific viscosity 15 to

** Specific weight at 15.6 ° C 0.9153, color according to ASTM test 12.0, flash point (COC) 216 ⁰ C

40 30th

Polyethylene

glycol (MW 400) 30

0.068 314

1.960 21.0

2.9
18.9

Viscosity at 30 ⁰ C 559 Saybolt seconds.

Production of

Claims (1)

Claim: Thermoplastic masses for molded bodies, consisting of a) 30 to 80 percent by volume of a polyolefin or polyolefin blend with a melt index under a standard load of about zero, b) 6 to 50 volume percent of an inert filler and c) 7 to 40 percent by volume of a conventional plasticizer, according to patent application P 1267423.6-43, characterized in that they are water-insoluble fillers and completely or partially water-soluble Contain plasticizers.